Ratchet wrench
OwnerYu-Tang Cheninventor
Life of this patent
Estimating the term…
Abstract
A ratchet wrench includes a wrench body having a circular space defined at a head portion of the wrench body, a ratchet with a hollow center placed into the circular space. The ratchet is symmetric to the wrench body. The inner wall of the ratchet has a plurality of first ridges formed thereon. A first recess is formed between each of two adjacent first ridges. Each of the first recesses selectively has a second ridge formed thereon. A second recess is defined on the second ridge. The shape of the second recess is as same as the first recess. In this way, a user can directly alternate the big and small bolts in the ratchet wrench, rather than turn over the wrench to fit the big or small bolt.
Claims3
A ratchet wrench comprising:
- a wrench body having a circular space defined at a head portion of the wrench body;
- a ratchet with a hollow center placed into the circular space, the ratchet extending out of the two sides of the wrench body, the ratchet being symmetric to the wrench body, a plurality of annular teeth formed along the peripheral of the ratchet corresponding to the circular space, the inner wall of the ratchet having a plurality of first ridges formed thereon, a first recess formed between each of two adjacent first ridges, each of the first recesses selectively having a second ridge formed thereon, a second recess defined on each of the second ridges, the shape of the second recess as same as the first recess, two stopper portions orthogonally formed between each of the first recesses and the second ridges, the two stopper portions respectively located at two ends of the second ridge;
- and
- a switch device assembled to the head portion of the wrench body, the switch device including a pawl and a positioning member, the pawl engaged with the annular teeth of the ratchet so as to limit the rotating direction of the ratchet, the pawl locked by the positioning member so as to prevent the pawl rotating from one unexpected direction.
A ratchet wrench comprising:
- a wrench body having a circular space defined at a head portion of the wrench body;
- a ratchet with a hollow center placed into the circular space, the ratchet extending out of the two sides of the wrench body, the ratchet being symmetric to the wrench body, a plurality of annular teeth formed along the peripheral of the ratchet corresponding to the circular space, the inner wall of the ratchet having a plurality of first ridges formed thereon, a first recess formed between each of two adjacent first ridges, only two faced second ridges formed on the two faced first recesses, a second recess defined on each of the second ridges, the shape of the second recess as same as the first recess, two stopper portions orthogonally formed between of the first recesses and the second ridges, the two stopper portions respectively located at two ends of the second ridge;
- and
- a switch device assembled to the head portion of the wrench body, the switch device including a pawl and a positioning member, the pawl engaged with the annular teeth of the ratchet so as to limit the rotating direction of the ratchet, the pawl locked by the positioning member so as to prevent the pawl rotating from one unexpected direction.
Dependencies are inferred from the claim text.